Clothes in the washer right now
I just came back from my boat, where I spent an hour or so rebuilding my Jabsco head pump with their service kit. It was no problem. The pump did not draw any water in the wet bowl position. I tried head lube over the weekend, but alas, it did not do the trick. I sprang for the full kit. (BTW, West Marine agreed to reduce their price from $62 to the $43 price I found online.) The installation of the new O-ring and gaskets was straightforward and no prblem, if just a little messy. Next time I will bring a long shaft phillips screwdriver, as one of the pump mounting screws was a pretty tight reach between the pump body and the bowl. I don't know your model toilet, but I can't imagine that the technology is much different than the Jabsco. Have fun! You might want to wear rubber gloves, and have your cell phone out of your pocket before you start, so that when your wife calls in the middle of the job, you're not slipping a wet hand covered with questionable bacteria into your pants pocket!